/*
 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package org.graalvm.tools.lsp.server;

import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;

/**
 * Trigger characters of languages.
 */
public final class LanguageTriggerCharacters {

    private final Map<String, List<String>> langTriggerCharacters = new ConcurrentHashMap<>();
    private final List<String> anyLangTriggerCharacters = new CopyOnWriteArrayList<>();

    void add(String languageId, List<String> triggerCharacters) {
        if (languageId == null) {
            anyLangTriggerCharacters.addAll(triggerCharacters);
        } else {
            langTriggerCharacters.put(languageId, triggerCharacters);
        }
    }

    public List<String> getTriggerCharacters(String languageId) {
        if (languageId == null) {
            return anyLangTriggerCharacters;
        } else {
            List<String> triggerCharacters = langTriggerCharacters.get(languageId);
            if (triggerCharacters == null) {
                triggerCharacters = anyLangTriggerCharacters;
            }
            return triggerCharacters;
        }
    }
}
